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springo
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Homework Statement
A sphere with radius R is charged with surface density σ. The charge found in a small surface Δs is repelled by the rest of the sphere, thus generating an electrostatic pressure. Find the pressure.
Homework Equations
The Attempt at a Solution
I think I have to compute the field for the sphere, which can be done using Gauss' law. For Δs: Esph = σ/ε0
Then I think I have to find the field for Δs and subtract it, but I don't know how to find it.
If field is constant, ten just multiplying QΔs = Δs·σ by the field would give the force.
Thanks for your help!